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Yamaha PWC flash

Practical Reflash Tuning

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Discussion and questions related to the course Practical Reflash Tuning

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If anyone can shed some light I would greatly appreciate it. I own two waverunners, 2014 Yamaha FZS Waverunner and a 2018 GP1800R. I wanted to see if anyone knew how I can reflash the factory ecu on the unit. What software is used to make the edits to the factory ecu. I know one company called MAPTUNERX but want to see if there are any other options as I am looking to flash not just my waverunners but others.



Maptuner is an option if you want support and do just a few units since it's high licence fees per unit. It has a very good data logging function that requires another licence.

You can also use k-tag what is about 3000 usd and you can do as many units as you want. It's also available for 100 usd as a Chinese fake and i know people using it.

What is your application and expectation of the tuning? What modifications have you done to it so far?

I have a 2014 Yamaha FZR. I was planning on getting the Haltech Elite pnp harness and hook up my 1500 to the ski but I wasn't sure if there were any other options with regards to the stock ecu. I will check K-TAG out and see. With regards to modification the ski is completely stock right now. What about yours?

I’m stock class racing and very limited in the modifications. Besides several handling components, I got only air intake, titanium retainers and several impellers. Using a standalone ECU will be most comfortable and also not the most expensive option. Be aware that with k tag you will not have any datalog possibilities. The map tuner data log doesn’t show knock or applied ignition on Yamaha’s ECU so you are some kind of blind. I highly recommend you to get the Riva cooling upgrade and also consider a aftermarket intercooler. A rebon delete should give you more power for very small money. I can give you the ignition maps if you wish.

A core component is the impeller and wear ring. You can adjust the impeller pitch to gain more or less rpm. Your boost and power will increase with rpm until a certain point. In racing, I’m running 9000+ rpm but in training I change to a 8000rpm impeller. I would not go to high rpm on a fun-riding ski.

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